Hi Gang. Jphii and Stiltskin, thank you for your kind words regarding my recommendation of the 6f6g as regulators in the suprateks. They still continue to be a revelation to me as well. Bwhite.... I am a little perplexed as to why the cv-181/ecc32's would cause that effect to the remote in your friends syrah, as I had none of these problems when installed in mine. That said..... I should clarify a few things here first. Although the cv181 and 6sn7 have the same pin out and can be substituted in "some" circuits.In actual fact....they are quite different electrically and one must be very careful here. The cv 181/ecc 32 has different electrical characteristics and parameters. The cv181/ecc32 has different mu,gm, bias points and also requires much higher heater current than a 6sn7. It also has close to 30% more gain then an american 6sn7, and will sound louder than the 6sn7 at equivalent gain level. Some will perceive this extra gain to sound better,fuller,etc . While I concurr that the bottle shaped ecc32 is a great sounding tube when optimally biased ....however, it should really be rebiased when used in the supratek and would sound even better if it was biased closer to it's optimum sweet spot. However... like a many tube circuits, "system synergy" is the optimum word here and is really what tube rolling is all about. Jpms.....regarding your concerns with gain and sensitivity issues of the cary 805c when paired with highly efficient speakers.I can assure you that there would never be an issue with any of the supratek gain options or gain configurations. The Cary 805c [when optimized and voiced with better tubes] has to be considered one of the finest sounding tubed amplifiers ever made and certainly top shelf by anyones standards.When paired with the Supratek, you have a synergy that is nothing short of breath taking! I use Tannoy Westminster [98db efficient] and powered them with the 805c for more than 3 years and I still kick myself for selling them. When I received my syrah [which has both a high gain/low gain switch]. I never had an issue with noise or any other glitch's with either gain setting. A very big caution here though; and a good example of what I was alluding to earlier! If you have acquired the cv181/ecc32 to substitute the 6sn7 in your supratek. Do "NOT" substitute these for the 6sn7 in the Cary 805c, the current draw for the cv181/ecc 32 is far to high for the filament transformer in the cary 805c and could damage both the amp and the tube!!!
